C#加密算法總結(jié)

C#加密算法總結(jié)

md5加密

 1         /// <summary> 2         /// MD5加密 3         /// </summary> 4         /// <param name="strPwd">原字符串</param> 5         /// <returns>加密后字符串</returns> 6         public static string GetMD5(string strPwd) 7         { 8             //MD5 對象創(chuàng)建的兩種方式 9             //MD5 md5 = MD5.Create();10             MD5 md5 = new MD5CryptoServicePRovider();11             //將輸入的密碼轉(zhuǎn)換成字節(jié)數(shù)組12             byte[] bPwd = Encoding.UTF8.GetBytes(strPwd);    13             //計算指定字節(jié)數(shù)組的哈希值14             byte[] bMD5 = md5.ComputeHash(bPwd);15             //釋放加密服務(wù)提供類的所有資源16             md5.Clear();   17             StringBuilder sbMD5Pwd = new StringBuilder();18             for (int i = 0; i < bMD5.Length; i++)19             {20                 //將每個字節(jié)數(shù)據(jù)轉(zhuǎn)換為2位的16進制的字符21                 sbMD5Pwd.Append(bMD5[i].ToString("x2"));22             }23             return sbMD5Pwd.ToString();24         }

SHA1加密

 1         /// <summary> 2         /// 使用 SHA1 加密算法來加密 3         /// </summary> 4         /// <param name="sourceString">原字符串</param> 5         /// <returns>加密后字符串</returns> 6         public static string SHA1_Encrypt(string sourceString) 7         { 8             byte[] StrRes = Encoding.UTF8.GetBytes(sourceString); 9             HashAlgorithm iSHA = new SHA1CryptoServiceProvider();10             StrRes = iSHA.ComputeHash(StrRes);11             StringBuilder EnText = new StringBuilder();12             foreach (byte iByte in StrRes)13             {14                 EnText.AppendFormat("{0:x2}", iByte);15             }16             return EnText.ToString();17         }

SHA256加密

 1         /// <summary> 2         /// SHA256 加密 3         /// </summary> 4         /// <param name="sourceString">原字符串</param> 5         /// <returns>加密后字符串</returns> 6         public static string SHA256_Encrypt(string sourceString) 7         { 8             byte[] data = Encoding.UTF8.GetBytes(sourceString); 9             SHA256 shaM = SHA256.Create();10             byte[] result = shaM.ComputeHash(data);11             StringBuilder EnText = new StringBuilder();12             foreach (byte iByte in result)13             {14                 EnText.AppendFormat("{0:x2}", iByte);15             }16             return EnText.ToString();17         }

SHA384加密

 1         /// <summary> 2         /// SHA384 加密 3         /// </summary> 4         /// <param name="sourceString">原字符串</param> 5         /// <returns>加密后字符串</returns> 6         public static string SHA384_Encrypt(string sourceString) 7         { 8             byte[] data = Encoding.UTF8.GetBytes(sourceString); 9             SHA384 shaM = SHA384.Create();10             byte[] result = shaM.ComputeHash(data);11             StringBuilder EnText = new StringBuilder();12             foreach (byte iByte in result)13             {14                 EnText.AppendFormat("{0:x2}", iByte);15             }16             return EnText.ToString();17         }

SHA512加密

 1         /// <summary> 2         /// SHA512_加密 3         /// </summary> 4         /// <param name="sourceString">原字符串</param> 5         /// <returns>加密后字符串</returns> 6         public static string SHA512_Encrypt(string sourceString) 7         { 8             byte[] data = Encoding.UTF8.GetBytes(sourceString); 9             SHA512 shaM = new SHA512Managed();10             byte[] result = shaM.ComputeHash(data);11             StringBuilder EnText = new StringBuilder();12             foreach (byte iByte in result)13             {14                 EnText.AppendFormat("{0:x2}", iByte);15             }16             return EnText.ToString();17         }

AES加密、解密

 1         /// <summary> 2         /// AES加密 3         /// </summary> 4         /// <param name="encryptStr">加密字符串</param> 5         /// <param name="encryptKey">密鑰</param> 6         /// <returns>密碼</returns> 7         public static string AESEncrypt(string encryptStr, string encryptKey) 8         { 9             if (string.IsNullOrWhiteSpace(encryptStr))10                 return string.Empty;11 12             encryptKey = StringHelper.SubString(encryptKey, 32);13             encryptKey = encryptKey.PadRight(32, ' ');14 15             //分組加密算法16             SymmetricAlgorithm des = Rijndael.Create();17             byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptStr);//得到需要加密的字節(jié)數(shù)組 18             //設(shè)置密鑰及密鑰向量19             des.Key = Encoding.UTF8.GetBytes(encryptKey);20             des.IV = _aeskeys;21             byte[] cipherBytes = null;22             using (MemoryStream ms = new MemoryStream())23             {24                 using (CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write))25                 {26                     cs.Write(inputByteArray, 0, inputByteArray.Length);27                     cs.FlushFinalBlock();28                     cipherBytes = ms.ToArray();//得到加密后的字節(jié)數(shù)組29                     cs.Close();30                     ms.Close();31                 }32             }33             return Convert.ToBase64String(cipherBytes);34         }35 36         /// <summary>37         /// AES解密38         /// </summary>39         /// <param name="decryptStr">解密字符串</param>40         /// <param name="decryptKey">密鑰</param>41         /// <returns>原碼</returns>42         public static string AESDecrypt(string decryptStr, string decryptKey)43         {44             if (string.IsNullOrWhiteSpace(decryptStr))45                 return string.Empty;46 47             decryptKey = StringHelper.SubString(decryptKey, 32);48             decryptKey = decryptKey.PadRight(32, ' ');49 50             byte[] cipherText = Convert.FromBase64String(decryptStr);51 52             SymmetricAlgorithm des = Rijndael.Create();53             des.Key = Encoding.UTF8.GetBytes(decryptKey);54             des.IV = _aeskeys;55             byte[] decryptBytes = new byte[cipherText.Length];56             using (MemoryStream ms = new MemoryStream(cipherText))57             {58                 using (CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Read))59                 {60                     cs.Read(decryptBytes, 0, decryptBytes.Length);61                     cs.Close();62                     ms.Close();63                 }64             }65             return Encoding.UTF8.GetString(decryptBytes).Replace("/0", "");//將字符串后尾的'/0'去掉66         }